I have finally settled on a strategy that I am now pursuing.
I intend to get to 5000 cards and I believe I can do it by end of June at the latest.
It is as follows. Get to 5000 cards by paying no more than 20p a card.
I have 1850 cards so need 3150 x 20p = £630
Top 8 players £211
Second 8 players = £86
Next 11 = £86
Kante = £76
Next 9 £29
Total = £613
The difference will be mopped up with free cards and roulette.
Once I get to 5000 cards (and bank my free legendary card) I will put up all the 20p cards for sale at £1 and then bring the % down by 1% a day until all sell. I will hold the price at 25p minimum for a 20% profit. This will take a long time.
As they start selling, I will go through the figures again and do the same with common cards (currently need 209 more) and then onto rare.
This will have the effect of making my port smaller as we go through, but better.
I will play tourneys as and when and any profit from this speeds up the journey (and means I need to sell less top players), but for now, I am comfortable that I can buy enough 20p cards with the balance I have, to increase profits.